Heck yes, they should run into each other! Malfoy is going to be freaked out nine ways to Sunday in Nurarihyon's body.

I'd just like to ask about the implications of being a demon, and of not having a heart. Does this make him emotionless? I think Malfoy doesn't know how to control the Shin-Meikyoushisui as well. He might unintentionally use it and start to get angry why no one's paying attention to him, XD.